Preprint Review Version 2 This version is not peer-reviewed

Epigenomics of Plant’s Responses to Environmental Stress

Version 1 : Received: 30 October 2017 / Approved: 30 October 2017 / Online: 30 October 2017 (15:55:41 CET)
Version 2 : Received: 23 November 2017 / Approved: 23 November 2017 / Online: 23 November 2017 (07:42:21 CET)
Version 3 : Received: 24 December 2017 / Approved: 25 December 2017 / Online: 25 December 2017 (09:43:03 CET)

A peer-reviewed article of this Preprint also exists.

Kumar, S. Epigenomics of Plant Responses to Environmental Stress. Epigenomes 2018, 2, 6. Kumar, S. Epigenomics of Plant Responses to Environmental Stress. Epigenomes 2018, 2, 6.

Journal reference: epigenomes 2018, 2, 6
DOI: 10.3390/epigenomes2010006

Abstract

Genome-wide epigenetic changes in plants are being reported during the development and environmental stresses, which are often correlated with gene expression at the transcriptional level. Sum total of the biochemical changes in nuclear DNA, post-translational modifications in histone proteins and variations in the biogenesis of non-coding RNAs in a cell is known as epigenome. These changes are often responsible for variation in expression of the gene without any change in the underlying nucleotide sequence. The changes might also cause variation in chromatin structure resulting into the changes in function/activity of the genome. The epigenomic changes are dynamic with respect to the endogenous and/or environmental stimuli which affect phenotypic plasticity of the organism. Both, the epigenetic changes and variation in gene expression might return to the pre-stress state soon after withdrawal of the stress. However, a part of the epigenetic changes may be retained which is reported to play role in acclimatization, adaptation as well as in the evolutionary processes. Understanding epigenome-engineering for improved stress tolerance in plants has become essential for better utilization of the genetic factors. This review delineates the importance of epigenomics towards possible improvement of plant’s responses to environmental stresses for climate resilient agriculture.

Subject Areas

epigenome; DNA modification; cytosine methylation; gene regulation; histone modification; 5-methylcytosine; stress response

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